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CVE-2025-66037

OpenSC: Out of Bounds vulnerability

Published: Mar 30, 2026Updated: Apr 1, 2026 Sources: CVE List NVDCWE-125
NVD MITRE
3.9CVSSLOW
EPSS Score
0.3%
Top 83.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

OpenSC is an open source smart card tools and middleware. Prior to version 0.27.0, feeding a crafted input to the fuzz_pkcs15_reader harness causes OpenSC to perform an out-of-bounds heap read in the X.509/SPKI handling path. Specifically, sc_pkcs15_pubkey_from_spki_fields() allocates a zero-length buffer and then reads one byte past the end of that allocation. This issue has been patched in version 0.27.0.

CVSS Vector Breakdown

AV:PAC:HPR:NUI:NS:UC:LI:LA:L
Exploitability
AV:PAttack Vector
Physical
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:LAvailability
Low
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Weaknesses

CWE-125

Affected Products

openscopensc project
Library
OSS Libraries / generic-library
OpenSCOpenSC
Library
Security Products / pki-crypto
opensc projectoss-projectOSS Librariesaka opensc, opensc project
openscoss-projectSecurity Products

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

https://github.com/OpenSC/OpenSC/security/advisories/GHSA-m58q-rmjm-mmfx
github.com
https://github.com/OpenSC/OpenSC/wiki/CVE-2025-66037
github.com

Timeline

Published
Mar 30, 2026
Last Updated
Apr 1, 2026

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